USS Charlie B. Mason (SP-1225), frequently but apparently incorrectly referred to as Charles B. Mason,[1] was a United States Navy patrol vessel in commission from 1917 to 1918.

Charlie B. Mason was a motorboat built in 1900 at Hopkins, Virginia, probably for use as a commercial fishing boat.

On 1 June 1917, the U.S. Navy chartered her from her owner, John K. Colona of Chincoteague, Virginia, for use as a section patrol boat during World War I.

She was commissioned the same day as USS Charlie B. Mason (SP-1225).

Assigned to the 5th Naval District, Charlie B. Mason operated on patrol duty for the rest of World War I.